Custom web and software applications, built end-to-end around your workflows, your users and — where it helps — AI. From MVP to production SaaS, we design, build and ship software that fits your business instead of forcing your business to fit the software.
Last updated: 11 June 2026
Off-the-shelf tools take you most of the way, then stop right where your business gets interesting. Application development is for the rest — the custom web apps, internal tools and platforms that match how you actually work. We build them properly: well-architected, secure and ready to scale.
And because AI is in our DNA, we weave it in where it earns its place — search, automation, copilots, recommendations — without bolting on features nobody asked for.
Custom web apps and SaaS platforms, from MVP to a product your users rely on daily.
Dashboards, admin panels and workflow tools that replace spreadsheets and manual steps.
Search, chat, automation and recommendations built into the product where they add real value.
Clean APIs and connections to the tools and services your business already runs on.
Scalable, secure infrastructure on AWS, Azure or GCP, built to grow with you.
Ongoing updates, monitoring and improvements so the product keeps earning its keep.
We pin down the users, the workflows and what success actually looks like.
We shape the architecture and UX before a line of code is written.
We develop in short, visible cycles so you see progress every week.
We ship, support and keep improving alongside your team.
Both. We can ship a focused MVP to validate the idea quickly, then grow it into a full product as it proves itself in the market.
No. We add AI only where it genuinely helps. Plenty of what we build is solid, well-crafted software — with AI as an option, not a requirement.
Modern, proven stacks — typically React/Next.js on the front end, Node or Python on the back, on AWS, Azure or GCP — chosen to fit your needs, not our habits.
Yes. We can lead the build, embed with your developers, or hand over a clean, documented codebase for your team to own.
We offer maintenance and continuous improvement, so the application keeps evolving with your business rather than going stale after launch.
We use Python for AI/ML layers and match the frontend and API layer to your existing stack (React, Next.js, Node, FastAPI, etc.). We avoid proprietary framework lock-in wherever possible.
Every project includes documented code, a runbook and a handover session with your team. If you want to take over maintenance in-house, we structure the build so you can — and we stay available.
Yes. We include a compliance checklist at scoping: data residency, consent flows, access control, audit logging and — where the application is high-risk under the EU AI Act — conformity assessment documentation.
Crux Digits is a boutique, senior application development studio in the Utrecht region, working with clients across the Netherlands and the EU, remotely or on-site. We build custom web apps, SaaS platforms and internal tools. You work directly with senior engineers who do the build themselves, no offshore hand-off, in English or Dutch. You own the source code and the IP.
We start with a short paid discovery to scope the app, then quote a fixed price so there are no surprises. As a rough guide, a proof of concept starts from a few thousand euros, a production-ready MVP from around 20k, and larger builds from 50k, with timelines confirmed once scope is clear. Senior engineers do the work, and the Dutch WBSO R&D scheme can offset part of the cost.
Tell us what you want to build — we'll turn it into a clear plan and a working product. Start with a free consultation.
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